package com.guifan.controller.advice;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.guifan.controller.exception.APIException;
import com.guifan.inter.NotControllerResponseAdvice;
import com.guifan.inter.enums.ResultCode;
import com.guifan.vo.ResultVo;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * @author God.Jhon.Black
 * @date 2023-01-17
 */
@RestControllerAdvice(basePackages = {"com.guifan.controller"})
public class ControllerResponseAdvice implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> aClass) {
        boolean assignableFrom = methodParameter.getParameterType().isAssignableFrom(ResultVo.class);
        boolean annotation = methodParameter.hasMethodAnnotation(NotControllerResponseAdvice.class);
        return !(assignableFrom || annotation);
    }

    @Override
    public Object beforeBodyWrite(Object data, MethodParameter returnType, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass, ServerHttpRequest request, ServerHttpResponse response) {
        if (returnType.getGenericParameterType().equals(String.class)) {
            ObjectMapper objectMapper = new ObjectMapper();
            try {
                return objectMapper.writeValueAsString(new ResultVo(data));
            } catch (JsonProcessingException e) {
                throw new APIException(ResultCode.RESPONSE_PACK_ERROR, e.getMessage());
            }
        }
        return new ResultVo(data);
    }
}